<template>
	<div class="player" v-show='playlist.length>0'>
    <transition name="normal"
                @enter="enter"
                @after-enter="afterEnter"
                @leave="leave"
                @after-leave="afterLeave"
    >
		<div class="normal-player" v-show='fullScreen'>
			<div class="background">
        <img width="100%" height="100%" :src='currentSong.image'>   
      </div>
      <div class="top">
        <div class="back">
          <i class="icon-back" @click='back'></i>
        </div>
        <h1 class="title" v-text='currentSong.name'></h1>
        <h2 class="subtitle" v-text='currentSong.singer'></h2>
      </div>
      <div class="middle">
        <div class="middle-l">
          <div class="cd-wrapper" ref="cdWrapper">
            <div class="cd" :class="cdCls">
              <img class="image" :src="currentSong.image"></img>
            </div>
          </div>
        </div>
      </div>
      <div class="bottom">
          <div class="dot-wrapper">
            <span class="dot"></span>
            <span class="dot"></span>
          </div>
          <div class="progress-wrapper">
            <span class="time time-l">{{format(currentTime)}}</span>
            <div class="progress-bar-wrapper">
              <progress-bar 
                            :percent='percent'
                            @percentChange='onPercentChange'
                            ></progress-bar>
            </div>
            <span class="time time-r">{{format(currentSong.duration)}}</span>
          </div>
          <div class="operators">
            <div class="icon i-left" @click="changeMode">
              <i :class="iconMode"></i>
            </div>
            <div class="icon i-left" @click='prev' :class="disabledCls">
              <i class="icon-prev"></i>
            </div>
            <div @click="togglePlay" class="icon i-center" :class="disabledCls">
              <!-- <i :class="[playing ? 'icon-pause' : 'icon-play']"></i> -->
              <i :class="iconPlay"></i>
            </div>
            <div @click='next' class="icon i-right" :class='disabledCls'>
              <i class="icon-next"></i>
            </div>
            <div class="icon i-right">
              <i class="icon icon-not-favorite"></i>
            </div>
          </div>
        </div>
		</div>
    </transition>
    <transition name="mini">
		<div class="mini-player" v-show="!fullScreen" @click="open" >
        <div class="icon">
          <img :class="cdCls" width="40" height="40" :src="currentSong.image">
        </div>
        <div class="text">
          <h2 class="name" v-text='currentSong.album'></h2>
          <p class="desc" v-text='currentSong.name'></p>
        </div>
        <div class="control" >
          <progress-circle :radius="radius" :percent="percent">
            <i @click.stop="togglePlay" :class="[playing ? 'icon-pause-mini' : 'icon-play-mini']"  class="icon-mini"></i>
          </progress-circle>
        </div>
        <div class="control">
          <i class="icon-playlist"></i>
        </div>
     </div>
     </transition>
     <audio :src="currentSong.url" ref="audio" 
            @canplay="ready" 
            @error="error" 
            @timeupdate="uptdaeTime"
            @ended="end"></audio>
	</div>
</template>

<script type="text/ecmascript-6">
	import {mapGetters, mapMutations} from 'vuex'
  import animations from 'create-keyframe-animation'
  import {prefixStyle} from 'common/js/dom'
  import ProgressBar from 'base/progress-bar/progress-bar'
  import ProgressCircle from 'base/progress-circle/progress-circle'
  import {playMode} from 'common/js/config'
  import {shuffle} from 'common/js/util'
  const transform = prefixStyle('transform')
	export default {
    data() {
      return {
        songReady: false,
        currentTime: 0,
        radius: 32
      }
    },
		computed: {
      iconMode() {
        return this.mode === playMode.sequence ? 'icon-sequence' :
               this.mode === playMode.loop ? 'icon-loop' : 'icon-random'
      },
      percent() {
        return this.currentTime / this.currentSong.duration
      },
      cdCls() {
        return this.playing ? 'play' : 'play pause'
      },
      iconPlay() {
        return this.playing ? 'icon-pause' : 'icon-play'
      },
      disabledCls() {
        return this.songReady ? '' : 'disable'
      },
			...mapGetters([
				'fullScreen',
				'playlist',
        'currentSong',
        'playing',
        'currentIndex',
        'mode',
        'sequenceList'
			])
		},
    methods: {
      back() {
        this.setFullScreen(false)
      },
      open() {
        this.setFullScreen(true)
      },
      enter(el, done) {
        const {x,y,scale} = this._getPosAndScale()

        let animation = {
          0: {
            transform: `translate3d(${x}px,${y}px,0) scale(${scale})`
          },
          60: {
            transform: `translate3d(0,0,0) scale(1.1)`
          },
          100: {
            transform: `translate3d(0, 0, 0) scale(1)`
          }
        }
        animations.registerAnimation({
          name: 'move',
          animation,
          presets: {
            duration: 400,
            easing: 'linear',
          }
        })
        animations.runAnimation(this.$refs.cdWrapper,'move', done)
      },
      afterEnter() {
        animations.unregisterAnimation('move');
        this.$refs.cdWrapper.style.animation = ''
      },
      leave(el, done) {
        this.$refs.cdWrapper.style.transition = 'all 0.4s'
        const {x, y, scale} = this._getPosAndScale()
        this.$refs.cdWrapper.style[transform] = `translate3d(${x}px,${y}px,0) scale(${scale})`
        this.$refs.cdWrapper.addEventListener('transitionend', done)
      },
      afterLeave() {
        this.$refs.cdWrapper.style.transition = ''
        this.$refs.cdWrapper.style[transform] = ''
      },
      togglePlay() {
        this.playing = this.setPlayingState(!this.playing)
      },
      prev() {
        if(!this.songReady){
          return
        } 
        let index = this.currentIndex -1
        index= index < 0 ? this.playlist.length-1 : index
        this.setCurrentIndex(index)
        // 播放暂停的情况下  currentIndex改变  currentSong会改变 audio dom重新渲染会调用audio.play()
        if(!this.playing) {
          this.togglePlay()
        }
        this.songReady = false
      },
      next() {
        if(!this.songReady) {
          return
        }
        let index = this.currentIndex + 1
        let listLength = this.playlist.length
        index = index == this.playlist.length ? 0 : index
        this.setCurrentIndex(index)
        if(!this.playing) {
          this.togglePlay()
        }
        this.songReady = false
      },
      end() {
        if(this.mode == playMode.loop) {
          this.loop()
        }else{
          this.next()
        }
        
      },
      loop() {
        if(!this.songReady) {
          return
        }
        this.$refs.audio.currentTime = 0
        this.$refs.audio.play()
      },
      uptdaeTime(e) {
        this.currentTime = e.target.currentTime
      },
      ready() {
        this.songReady = true
      },
      error() {
        this.songReady = true
      },
      format(interval) {
        // ｜0 相当于Math.floor()  向下取整 
        interval = interval | 0
        const minute = interval/60 | 0
        const second = this._pad(interval % 60)
        return `${minute}:${second}`
      },
      onPercentChange(percent) {
        let currentTime = this.currentSong.duration * percent
        this.$refs.audio.currentTime = currentTime
        if(!this.playing) {
          this.togglePlay()
        }
      },
      changeMode() {
        let mode = this.mode === 2 ? 0 : parseInt(this.mode) + 1
        this.setPlayMode(mode)
        let list = null
        if(mode === playMode.random) {
          list = shuffle(this.sequenceList)
        }else{
          list = this.sequenceList
        }
        this.setPlayList(list)
      },
      _pad(num,n = 2){  //往秒前补n-1个0
        let len = num.toString().length
        while(len < n) {
          num = '0' + num
          len++
        }
        return num
      },
      _getPosAndScale() {
        const targetWidth = 40
        const paddingLeft = 40
        const paddingBottom = 30
        const paddingTop = 80
        const width = window.innerWidth * 0.8
        const scale = targetWidth / width
        const x = -(window.innerWidth/2 - paddingLeft)
        const y = window.innerHeight - paddingTop - width/2 - paddingBottom

        return {
          x,
          y,
          scale
        }
      },
      ...mapMutations({
        setFullScreen: 'SET_FULLSCREEN',
        setPlayingState: 'SET_PLAYING_STATE',
        setCurrentIndex: 'SET_CURRENT_INDEX',
        setPlayMode: 'SET_PLAY_MODE',
        setPlayList: 'SET_PLAYLIST'
      })
    },
    watch: {
      currentSong() {
        // dom更新后
        this.$nextTick(() => {
          this.$refs.audio.play()
        })
      },
      playing() {
        this.$nextTick(() => {
          this.playing ? this.$refs.audio.play() : this.$refs.audio.pause()
        })
      }
    },
    components: {
      ProgressBar,
      ProgressCircle
    }
	}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"
  @import "~common/stylus/mixin"

  .player
    .normal-player
      position: fixed
      left: 0
      right: 0
      top: 0
      bottom: 0
      z-index: 150
      background: $color-background
      .background
        position: absolute
        left: 0
        top: 0
        width: 100%
        height: 100%
        z-index: -1
        opacity: 0.6
        filter: blur(20px)
      .top
        position: relative
        margin-bottom: 25px
        .back
          position absolute
          top: 0
          left: 6px
          z-index: 50
          .icon-back
            display: block
            padding: 9px
            font-size: $font-size-large-x
            color: $color-theme
            transform: rotate(-90deg)
        .title
          width: 70%
          margin: 0 auto
          line-height: 40px
          text-align: center
          no-wrap()
          font-size: $font-size-large
          color: $color-text
        .subtitle
          line-height: 20px
          text-align: center
          font-size: $font-size-medium
          color: $color-text
      .middle
        position: fixed
        width: 100%
        top: 80px
        bottom: 170px
        white-space: nowrap
        font-size: 0
        .middle-l
          display: inline-block
          vertical-align: top
          position: relative
          width: 100%
          height: 0
          padding-top: 80%
          .cd-wrapper
            position: absolute
            left: 10%
            top: 0
            width: 80%
            height: 100%
            .cd
              width: 100%
              height: 100%
              box-sizing: border-box
              border: 10px solid rgba(255, 255, 255, 0.1)
              border-radius: 50%
              &.play
                animation: rotate 20s linear infinite
              &.pause
                animation-play-state: paused
              .image
                position: absolute
                left: 0
                top: 0
                width: 100%
                height: 100%
                border-radius: 50%

          .playing-lyric-wrapper
            width: 80%
            margin: 30px auto 0 auto
            overflow: hidden
            text-align: center
            .playing-lyric
              height: 20px
              line-height: 20px
              font-size: $font-size-medium
              color: $color-text-l
        .middle-r
          display: inline-block
          vertical-align: top
          width: 100%
          height: 100%
          overflow: hidden
          .lyric-wrapper
            width: 80%
            margin: 0 auto
            overflow: hidden
            text-align: center
            .text
              line-height: 32px
              color: $color-text-l
              font-size: $font-size-medium
              &.current
                color: $color-text
      .bottom
        position: absolute
        bottom: 50px
        width: 100%
        .dot-wrapper
          text-align: center
          font-size: 0
          .dot
            display: inline-block
            vertical-align: middle
            margin: 0 4px
            width: 8px
            height: 8px
            border-radius: 50%
            background: $color-text-l
            &.active
              width: 20px
              border-radius: 5px
              background: $color-text-ll
        .progress-wrapper
          display: flex
          align-items: center
          width: 80%
          margin: 0px auto
          padding: 10px 0
          .time
            color: $color-text
            font-size: $font-size-small
            flex: 0 0 30px
            line-height: 30px
            width: 30px
            &.time-l
              text-align: left
            &.time-r
              text-align: right
          .progress-bar-wrapper
            flex: 1
        .operators
          display: flex
          align-items: center
          .icon
            flex: 1
            color: $color-theme
            &.disable
              color: $color-theme-d
            i
              font-size: 30px
          .i-left
            text-align: right
          .i-center
            padding: 0 20px
            text-align: center
            i
              font-size: 40px
          .i-right
            text-align: left
          .icon-favorite
            color: $color-sub-theme
      &.normal-enter-active, &.normal-leave-active
        transition: all .4s
        .top, .bottom
          transition: all .4s cubic-bezier(0.86, 0.18, 0.82, 1.32)
      &.normal-enter, &.normal-leave-to
        opacity: 0
        .top
          transform: translate3d(0, -100px, 0)
        .bottom
          transform: translate3d(0, 100px, 0)
    .mini-player
      display: flex
      align-items: center
      position: fixed
      left: 0
      bottom: 0
      z-index: 180
      width: 100%
      height: 60px
      background: $color-highlight-background
      &.mini-enter-active, &.mini-leave-active
        transition: all 0.4s
      &.mini-enter, &.mini-leave-to
        opacity: 0
      .icon
        flex: 0 0 40px
        width: 40px
        padding: 0 10px 0 20px
        img
          border-radius: 50%
          &.play
            animation: rotate 10s linear infinite
          &.pause
            animation-play-state: paused
      .text
        display: flex
        flex-direction: column
        justify-content: center
        flex: 1
        line-height: 20px
        overflow: hidden
        .name
          margin-bottom: 2px
          no-wrap()
          font-size: $font-size-medium
          color: $color-text
        .desc
          no-wrap()
          font-size: $font-size-small
          color: $color-text-d
      .control
        flex: 0 0 30px
        width: 30px
        padding: 0 10px
        .icon-play-mini, .icon-pause-mini, .icon-playlist
          font-size: 30px
          color: $color-theme-d
        .icon-mini
          font-size: 32px
          position: absolute
          left: 0
          top: 0

  @keyframes rotate
    0%
      transform: rotate(0)
    100%
      transform: rotate(360deg)
</style>